[alsa-devel] ALC892 optical SPDIF not working

[Manuel Lauss]

On Mon, Aug 02, 2010 at 06:03:32PM +0200, Takashi Iwai wrote:
> At Mon, 02 Aug 2010 10:02:48 +0200,
> I wrote:
> > 
> > At Sun, 1 Aug 2010 01:32:23 +0200,
> > Manuel Lauss wrote:
> > > 
> > > > > >> Is there a way to insert an initial playback delay?  Under linux, the
> > > > > >> first 2-2.5 seconds
> > > > > >> of anything played are just silence; on windows audible playback
> > > > > >> starts immediately.
> > > > > >
> > > > > > It's the time for synchronization your digital receiver takes, I guess.
> > > > > > Maybe changing SPDIF status makes it resync, which happens at each
> > > > > > opening / closing the stream.
> > > > > 
> > > > > Yes, seems so. I've found a workaround in meantime.
> > > > 
> > > > Could you elaborate on the workaround please, so others having this
> > > > issue know it.
> > > 
> > > My receiver allows to mix analog and digital inputs; with analog mix
> > > enabled it syncs immediately.
> > 
> > Just wondering whether the patch below helps?
> > 
> > It's just a proof-of-concept, and it's not safe for multiple streams.
> > If this works, we can move on the improvement of the stream assignment.
> 
> ... and the below is the patch.  If the previous patch worked, try
> this instead of the previous one.


Tested with mplayer.  The initial 2-2.5sec silence is still there (on every
invocation of mplayer), but seeking now works as it should (previously
there was 2 sec silence too).  Disabling codec pm doesn't help.


Manuel Lauss